CN114630373A - Switching method and device - Google Patents

Switching method and device Download PDF

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Publication number
CN114630373A
CN114630373A CN202011423262.0A CN202011423262A CN114630373A CN 114630373 A CN114630373 A CN 114630373A CN 202011423262 A CN202011423262 A CN 202011423262A CN 114630373 A CN114630373 A CN 114630373A
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China
Prior art keywords
terminal
switching
threshold
height
different heights
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CN202011423262.0A
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CN114630373B (en
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梁辉
韩潇
冯毅
李福昌
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China United Network Communications Group Co Ltd
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China United Network Communications Group Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/14—Reselecting a network or an air interface
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/16—Performing reselection for specific purposes
    • H04W36/165—Performing reselection for specific purposes for reducing network power consumption
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/32—Reselection being triggered by specific parameters by location or mobility data, e.g. speed data
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The embodiment of the application provides a switching method and a switching device, relates to the technical field of communication, and can solve the problem that terminal equipment is frequently switched in a low-altitude area. The method comprises the following steps: the method comprises the steps that the terminal determines the height of the terminal under the condition that a first threshold parameter obtained in advance comprises a height interval, and then switching between network layers with different heights is executed according to the height of the terminal and the height interval; and the terminal determines the signal intensity of the current access network layer of the terminal under the condition that the first threshold parameter comprises the target signal intensity, and executes the switching between the network layers with the same height according to the signal intensity of the current access network layer of the terminal and the target signal intensity.

Description

Switching method and device
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a handover method and apparatus.
Background
In the existing communication system, a base station or a part of base station functions are deployed on a flight platform such as a satellite to provide seamless coverage for terminals such as an unmanned aerial vehicle. In this case, network layers of different heights are generally formed in the air region to improve the reliability of the communication system. Under the scene that a communication system carries out high-altitude layered coverage, when terminals such as an unmanned aerial vehicle are in the air, network switching requirements (namely same-layer switching) exist among network layers at the same height, and network switching requests (namely cross-layer switching) also exist among network layers at different heights.
However, in the existing communication system, service switching of terminals such as the unmanned aerial vehicle mainly uses signal strength as a judgment basis, and in a high-altitude layered coverage scene, network layers with different heights have repeated coverage in a low-altitude area, and in the repeatedly covered area, the signal strengths of different network layers are different, so that when the signal strength is used as the judgment basis, the problem that the terminals such as the unmanned aerial vehicle frequently switch in the low-altitude area exists.
Disclosure of Invention
The application aims to provide a switching method and a switching device, which can solve the problem that terminal equipment is frequently switched in a low-altitude area.
In a first aspect, the present application provides a handover method, including: the method comprises the steps that the terminal determines the height of the terminal under the condition that a first threshold parameter obtained in advance comprises a height interval, and then switching between network layers with different heights is executed according to the height of the terminal and the height interval; and the terminal determines the signal intensity of the current access network layer of the terminal under the condition that the first threshold parameter comprises the target signal intensity, and executes the switching between the network layers with the same height according to the signal intensity of the current access network layer of the terminal and the target signal intensity.
Based on the first aspect, the terminal may dynamically determine whether the terminal performs switching between network layers of different heights or performs switching between network layers of the same height according to a first threshold parameter sent by the network device; determining the height of the terminal under the condition that the first threshold parameter comprises a height interval, and executing switching between network layers with different heights according to the height of the terminal and the height interval; under the condition that the first threshold parameter comprises the target signal strength, the signal strength of the current access network layer of the terminal is determined, and the switching between the network layers with the same height is executed according to the signal strength of the current access network layer of the terminal and the target signal strength, so that the terminal can reasonably select the type of service switching of the terminal according to the height interval and the target signal strength, the reliability of a communication system is improved, and the problem of frequent switching of the terminal in a low-altitude area is solved.
In one possible design, the terminal determines to execute switching between network layers with different heights according to the height and the height interval of the terminal; the terminal receives a switching threshold configuration parameter from the network equipment, wherein the switching threshold configuration parameter is used for determining switching between network layers with different heights to be executed; and executing switching between network layers with different heights according to the switching threshold configuration parameters.
Based on the possible design, the terminal can compare the height of the terminal with the switching threshold configuration parameter, and when the comparison result of the height of the terminal and the switching threshold configuration parameter meets the condition, the terminal executes switching between network layers with different heights, so that the terminal can be prevented from executing switching between the network layers with different heights to cause errors.
In one possible design, before the terminal receives the handover threshold configuration parameter from the network device, the handover method further includes: and determining that the height of the terminal is not in the height interval.
Based on the possible design, when the height of the terminal is determined not to be in the height interval, namely the height of the terminal is in the boundary area of two adjacent network layers with different heights, the terminal can execute the switching between the network layers with different heights, and therefore the accuracy of the terminal in executing the switching between the network layers with different heights can be improved.
In one possible design, the first threshold parameter further includes a first time length threshold; the handover threshold configuration parameters include: a first altitude threshold, a second altitude threshold, a third altitude threshold and a fourth altitude threshold; under the condition that the height of the terminal is smaller than a first height threshold or the height of the terminal is larger than a second height threshold, switching between network layers with different heights is executed; or under the condition that the height of the terminal is positioned in the interval of the fourth height threshold and the third height threshold, switching between network layers with different heights is executed according to the first time length threshold.
Based on the possible design, the terminal can determine that the terminal executes the switching between the network layers with different heights under the condition that the height of the terminal is smaller than the first height threshold or the height of the terminal is larger than the second height threshold, so that the accuracy of the terminal executing the switching between the network layers with different heights is improved, and the reliability of a communication system is improved; in addition, the terminal can also execute switching between network layers with different heights according to the first time length threshold under the condition that the terminal is in the interval of the fourth height threshold and the third height threshold, so that the terminal is favorable for saving energy.
In one possible design, the handover configuration threshold parameter further includes: a first signal strength threshold, a second duration threshold and a third duration threshold; the switching method comprises the following steps: under the condition that the signal intensity of the first network layer is smaller than a second signal intensity threshold within a second time length threshold and the signal intensity of the second network layer is larger than a first signal intensity threshold within the second time length threshold, switching between the network layers with different heights is executed; otherwise, under the condition that the duration of the first timer is less than the third duration threshold, the signal intensity of the network layers with different heights is obtained again; when the duration of the first timer is greater than or equal to the third duration threshold, switching between network layers with different heights is executed according to the switching threshold configuration parameters again; the time length of the first timer is the time length used for switching between the network layers with different heights to the current time according to the signal strength of the network layers with different heights and the switching threshold configuration parameter at the last time.
Based on the possible design, the terminal can execute the switching between the network layers with different heights under the condition that the signal intensity of the terminal on the first network layer is smaller than the second signal intensity threshold in the second duration threshold and the signal intensity of the second network layer is larger than the first signal intensity threshold in the second duration threshold, otherwise, the terminal executes the switching between the network layers with different heights again according to the switching threshold configuration parameters under the condition that the duration of the first timer is larger than or equal to the third duration threshold, thereby being beneficial to further improving the accuracy of the terminal in executing the switching between the network layers with different heights, and being beneficial to reducing the communication delay so as to improve the reliability of the communication system.
In one possible design, the signal strength of the network layers with different heights is obtained again under the condition that the duration of the second timer is less than the first duration threshold; executing switching between the network layers with different heights according to the signal intensity of the network layers with different heights and the configuration parameters of the switching threshold; when the duration of the second timer is greater than or equal to the first duration threshold, switching between network layers with different heights is executed again according to the height of the terminal and the height interval; the duration of the second timer is the duration used for switching between network layers with different heights to the current time according to the height of the terminal and the height interval at the last time.
Based on the possible design, the terminal can dynamically determine that the terminal reacquires the signal strength of the network layer with different heights according to the duration of the second timer and the first duration threshold; according to the signal intensity of the network layers with different heights and the configuration parameters of the switching threshold, switching between the network layers with different heights is executed, or switching between the network layers with different heights is executed again according to the height and the height interval of the terminal, so that the accuracy of the terminal in executing switching between the network layers with different heights is improved, and the communication delay is reduced.
In one possible design, a terminal acquires the signal intensity of a current access network layer of the terminal; determining the signal intensity of a terminal switching network layer under the condition that the signal intensity of a terminal currently accessed to the network layer is smaller than the target signal intensity; and executing the switching between the network layers with the same height according to the signal intensity of the current access network layer of the terminal and the signal intensity of the switching network layer of the terminal.
Based on the possible design, the terminal can determine the signal intensity of the terminal switching network layer under the condition that the signal intensity of the terminal currently accessed to the network layer is smaller than the target signal intensity, so that the switching between the network layers with the same height is executed according to the signal intensity of the terminal currently accessed to the network layer and the signal intensity of the terminal switching network layer, the condition that the terminal executes the switching between the network layers with the same height to cause errors can be avoided, and the reliability of a communication system is improved.
In one possible design, a terminal acquires the signal intensity of a terminal switching network layer, and executes switching between network layers at the same height under the condition that the signal intensity of a terminal currently accessed to the network layer and the signal intensity of the terminal switching network layer meet preset conditions; otherwise, the signal intensity of the current access network layer of the terminal is obtained again until the terminal executes the switching between the network layers with the same height.
Based on the possible design, the terminal can execute the switching between the network layers with the same height under the condition that the signal intensity of the terminal switching network layer is greater than the signal intensity of the terminal currently accessed to the network layer, or the difference value between the signal intensity of the terminal switching network layer and the signal intensity of the terminal currently accessed to the network layer is greater than the threshold value, and reacquire the signal intensity of the terminal currently accessed to the network layer until the terminal executes the switching between the network layers with the same height, so that the accuracy of the terminal executing the switching between the network layers with the same height is improved, and the reliability of the communication system is also improved.
In a second aspect, an embodiment of the present application provides a terminal device, where the terminal device may implement the function executed by the terminal device in the above first aspect or the possible design of the first aspect, and the function may be implemented by executing corresponding software through hardware. The hardware or software comprises one or more modules corresponding to the functions. Such as a processing module. The processing module is used for determining the height of the terminal under the condition that the pre-acquired first threshold parameter comprises a height interval, and then executing switching between network layers with different heights according to the height of the terminal and the height interval; and the terminal determines the signal intensity of the current access network layer of the terminal under the condition that the first threshold parameter comprises the target signal intensity, and executes the switching between the network layers with the same height according to the signal intensity of the current access network layer of the terminal and the target signal intensity.
The specific implementation manner of the terminal device may refer to the behavior function of the terminal device in the method for acquiring a transmission parameter provided in the first aspect or any one of the possible designs of the first aspect, and based on the terminal device in the second aspect, the terminal device may dynamically determine whether the terminal performs switching between network layers of different heights or performs switching between network layers of the same height according to a first threshold parameter sent by the network device; determining the height of the terminal under the condition that the first threshold parameter comprises a height interval, and executing switching between network layers with different heights according to the height of the terminal and the height interval; under the condition that the first threshold parameter comprises the target signal strength, the signal strength of the current access network layer of the terminal is determined, and the switching between the network layers with the same height is executed according to the signal strength of the current access network layer of the terminal and the target signal strength, so that the terminal can reasonably select the type of service switching of the terminal according to the height interval and the target signal strength, the reliability of a communication system is improved, and the problem of frequent switching of the terminal in a low-altitude area is solved.
In one possible design, the terminal device further includes a transceiver module. The receiving and sending module is used for acquiring the height of the terminal and sending the height to the network equipment; the processing module is specifically configured to receive a switching threshold configuration parameter from the network device, and the terminal performs switching between network layers of different heights according to the switching threshold configuration parameter.
Based on the possible design, the terminal equipment can compare the height of the terminal with the switching threshold configuration parameter, and when the comparison result of the height of the terminal and the switching threshold configuration parameter meets the condition, the terminal executes switching between network layers with different heights, so that the terminal can be prevented from executing switching errors between the network layers with different heights.
In a possible design, the processing module is further configured to determine that the height of the terminal is not located in the height interval.
Based on the possible design, when the height of the terminal is determined not to be in the height interval, that is, the height of the terminal is located in the boundary area of two adjacent network layers with different heights, the terminal executes the switching between the network layers with different heights, and thus, the accuracy of executing the switching between the network layers with different heights by the terminal can be improved.
In one possible design, the first threshold parameter further includes a first time length threshold; the handover threshold configuration parameters include: a first altitude threshold, a second altitude threshold, a third altitude threshold, and a fourth altitude threshold; the processing module is used for executing switching between network layers with different heights under the condition that the height of the terminal is smaller than a first height threshold or the height of the terminal is larger than a second height threshold; or under the condition that the height of the terminal is in the interval of the fourth height threshold and the third height threshold, switching between network layers with different heights is executed according to the first time length threshold.
Based on the possible design, the terminal can determine that the terminal executes the switching between the network layers with different heights under the condition that the height of the terminal is smaller than the first height threshold or the height of the terminal is larger than the second height threshold, so that the accuracy of the terminal executing the switching between the network layers with different heights is improved, and the reliability of a communication system is improved; in addition, the terminal can also execute switching between network layers with different heights according to the first time length threshold under the condition of the interval between the fourth height threshold and the third height threshold of the height of the terminal, thereby being beneficial to saving energy of the terminal.
In one possible design, the handover configuration threshold parameter further includes: a first signal strength threshold, a second duration threshold and a third duration threshold; the processing module is further configured to perform a handover between network layers of different heights when the signal strength of the first network layer is smaller than a second signal strength threshold within a second duration threshold and the signal strength of the second network layer is greater than the first signal strength threshold within the second duration threshold; otherwise, the processing module is used for acquiring the signal intensity of the network layers with different heights again under the condition that the duration of the first timer is less than the third duration threshold; when the duration of the first timer is greater than or equal to the third duration threshold, switching between network layers with different heights is executed according to the switching threshold configuration parameters again; the time length of the first timer is the time length used for switching between the network layers with different heights to the current time according to the signal strength of the network layers with different heights and the switching threshold configuration parameter at the last time.
Based on the possible design, the terminal can execute the switching between the network layers with different heights under the condition that the signal intensity of the terminal on the first network layer is smaller than the second signal intensity threshold in the second duration threshold and the signal intensity of the second network layer is larger than the first signal intensity threshold in the second duration threshold, otherwise, the terminal executes the switching between the network layers with different heights again according to the switching threshold configuration parameters under the condition that the duration of the first timer is larger than or equal to the third duration threshold, thereby being beneficial to further improving the accuracy of the terminal in executing the switching between the network layers with different heights and further improving the reliability of the communication system.
In a possible design, the processing module is further configured to, in a case that the duration of the second timer is smaller than the first duration threshold, reacquire signal strengths of network layers of different heights; executing switching between the network layers with different heights according to the signal intensity of the network layers with different heights and the configuration parameters of the switching threshold; the processing module is further configured to, when the duration of the second timer is greater than or equal to the first duration threshold, perform handover between network layers of different heights again according to the height of the terminal and the height interval; the duration of the second timer is the duration used for switching between network layers with different heights to the current time according to the height of the terminal and the height interval at the last time.
Based on the possible design, the terminal can dynamically determine that the terminal reacquires the signal strength of the network layers with different heights according to the duration of the second timer and the first duration threshold; according to the signal intensity of the network layers with different heights and the configuration parameters of the switching threshold, switching between the network layers with different heights is executed, or switching between the network layers with different heights is executed again according to the height and the height interval of the terminal, so that the accuracy of the terminal in executing switching between the network layers with different heights is improved, and the terminal is favorable for saving energy.
In one possible design, the transceiver module is further configured to obtain a signal strength of a current access network layer of the terminal; the processing module is used for determining the signal intensity of the terminal switching network layer under the condition that the signal intensity of the terminal currently accessed to the network layer is smaller than the target signal intensity; and executing the switching between the network layers with the same height according to the signal intensity of the current access network layer of the terminal and the signal intensity of the switching network layer of the terminal.
Based on the possible design, the terminal can determine the signal intensity of the terminal switching network layer under the condition that the signal intensity of the terminal currently accessed to the network layer is smaller than the target signal intensity, so that the switching between the network layers with the same height is executed according to the signal intensity of the terminal currently accessed to the network layer and the signal intensity of the terminal switching network layer, the condition that the terminal executes the switching between the network layers with the same height to cause errors can be avoided, and the reliability of a communication system is improved.
In one possible design, the transceiver module is further configured to acquire a signal strength of a terminal switching network layer, and the processing module is further configured to execute switching between network layers at the same height when the signal strength of the terminal currently accessing the network layer and the signal strength of the terminal switching network layer meet a preset condition; otherwise, the signal intensity of the current access network layer of the terminal is obtained again until the terminal executes the switching between the network layers with the same height.
Based on the possible design, the terminal can execute the switching between the network layers with the same height under the condition that the signal intensity of the terminal switching network layer is greater than the signal intensity of the terminal currently accessed to the network layer, or the difference value between the signal intensity of the terminal switching network layer and the signal intensity of the terminal currently accessed to the network layer is greater than the threshold value, and reacquire the signal intensity of the terminal currently accessed to the network layer until the terminal executes the switching between the network layers with the same height, so that the accuracy of the terminal executing the switching between the network layers with the same height is improved, and the reliability of the communication system is also improved.
In a third aspect, a terminal device is provided, where the terminal device may be a terminal device or a chip or a system on a chip in the terminal device. The terminal device may implement the functions performed by the terminal device in the aspects or possible designs described above, which may be implemented by hardware and software.
In one possible design, the terminal device may include: a processor, a transceiver, a communication line, and a memory; the processor is connected with the memory through a communication line. The transceiver and the processor may be adapted to enable the terminal device to perform the functions referred to in the first aspect above or in any one of the possible designs of the first aspect. For example, the processor is configured to determine the height of the terminal under the condition that the first threshold parameter obtained in advance includes a height interval, and then perform switching between network layers with different heights according to the height of the terminal and the height interval; and the terminal determines the signal intensity of the current access network layer of the terminal under the condition that the first threshold parameter comprises the target signal intensity, and executes the switching between the network layers with the same height according to the signal intensity of the current access network layer of the terminal and the target signal intensity. Wherein the memory is used for storing computer execution instructions. The transceiver and the processor execute computer executable instructions stored by the memory to cause the terminal device to perform the handover method as described in the first aspect above or any one of the possible designs of the first aspect when the terminal device is operating.
In a fourth aspect, a computer-readable storage medium is provided, which stores a computer instruction or a program, which, when run on a computer, causes the computer to perform the switching method according to the first aspect or any possible design of the first aspect.
In a fifth aspect, there is provided a computer program product comprising instructions which, when run on a computer, cause the computer to perform the switching method according to the first aspect or any one of the possible designs of the first aspect.
Drawings
Fig. 1 is a schematic diagram of a communication system according to an embodiment of the present invention;
fig. 2 is a flowchart of a handover method according to an embodiment of the present invention;
fig. 3 is a flowchart of a handover method according to an embodiment of the present invention;
fig. 4 is a schematic diagram of an altitude interval included in a first threshold parameter according to an embodiment of the present invention;
fig. 5 is a flowchart of a handover method according to an embodiment of the present invention;
fig. 6 is a schematic diagram of a handover threshold configuration parameter according to an embodiment of the present invention;
fig. 7 is a flowchart of a handover method according to an embodiment of the present invention;
fig. 8 is a flowchart of a handover method according to an embodiment of the present invention;
fig. 9 is a flowchart of a handover method according to an embodiment of the present invention;
fig. 10 is a schematic structural diagram of a switching device according to an embodiment of the present invention;
fig. 11 is a configuration diagram of a terminal device according to an embodiment of the present invention.
Detailed Description
The following detailed description of embodiments of the present application refers to the accompanying drawings.
The term "and/or" herein is merely an association describing an associated object, meaning that three relationships may exist, e.g., a and/or B, may mean: a exists alone, A and B exist simultaneously, and B exists alone.
The terms "first" and "second" and the like in the description and drawings of the present application are used for distinguishing different objects or for distinguishing different processes for the same object, and are not used for describing a specific order of the objects.
Furthermore, the terms "including" and "having," and any variations thereof, as referred to in the description of the present application, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements but may alternatively include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
It should be noted that in the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or explanations. Any embodiment or design described herein as "exemplary" or "e.g.," is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.
In the description of the present application, the meaning of "a plurality" means two or more unless otherwise specified.
In order to solve the problems in the background art, an embodiment of the present application provides a handover method, where a terminal may dynamically determine, according to a first threshold parameter sent by a network device, whether the terminal performs a handover between network layers of different heights or performs a handover between network layers of the same height; determining the height of the terminal under the condition that the first threshold parameter comprises a height interval, and executing switching between network layers with different heights according to the height of the terminal and the height interval; under the condition that the first threshold parameter comprises the target signal strength, the signal strength of the current access network layer of the terminal is determined, and the switching between the network layers with the same height is executed according to the signal strength of the current access network layer of the terminal and the target signal strength, so that the terminal can reasonably select the type of service switching of the terminal according to the height interval and the target signal strength, the reliability of a communication system is improved, and the problem of frequent switching of the terminal in a low-altitude area is solved.
The following detailed description of embodiments of the present application refers to the accompanying drawings.
The handover method provided in the embodiment of the present application may be applied to any communication system, and the communication system may be a third generation partnership project (3 GPP) communication system, such as a Long Term Evolution (LTE) system, a fifth generation (5G) mobile communication system, a New Radio (NR) system, an NR V2X system, and other next generation communication systems, and may also be a non-3 GPP communication system, without limitation.
The switching method provided by the embodiment of the application can be applied to a scene of high-altitude layered coverage of a communication system.
In the following, by taking fig. 1 as an example, network handover requests existing between different coverage layers of the same height and between coverage layers of different heights in the process that terminal devices such as an unmanned aerial vehicle travel in the high altitude in the scene that the communication system performs high altitude layered coverage are described.
Fig. 1 is a schematic diagram of a communication system according to an embodiment of the present disclosure, where as shown in fig. 1, the communication system may include at least one terminal device and at least one network device; one network device may correspond to one network layer (also referred to as a cell) or two or more network layers with different heights. Fig. 1 illustrates an example in which one network device corresponds to two network layers with different heights. For example, in the communication system shown in fig. 1, the network device a corresponds to a first network layer X and a second network layer Y, and the network device B corresponds to the first network layer X and the second network layer Y; wherein the height of the first network layer X is greater than the height of the second network layer Y.
A terminal device (terminal) may be referred to as a User Equipment (UE), a Mobile Station (MS), a Mobile Terminal (MT), or the like, and establishes a connection with a coverage layer provided under a network device a or a network device B. Specifically, the terminal device in fig. 1 may be a mobile phone (mobile phone), a tablet computer, or a computer with a wireless transceiving function. But also a Virtual Reality (VR) terminal, an Augmented Reality (AR) terminal, a wireless terminal in industrial control, a wireless terminal in unmanned driving, a wireless terminal in telemedicine, a wireless terminal in smart grid, a wireless terminal in smart city (smart city), a wireless terminal in smart home (smart home), a vehicle-mounted terminal, a vehicle with vehicle-to-vehicle (V2V) communication capability, a smart internet vehicle, an unmanned aerial vehicle with unmanned aerial vehicle-to-unmanned aerial vehicle (UAV, U2U) communication capability, and so on, without limitation.
Taking a terminal device as an unmanned aerial vehicle as an example, in combination with the communication system shown in fig. 1, services of cross-layer switching and same-layer switching performed during the process of high-altitude traveling of the unmanned aerial vehicle are described. Referring to fig. 1, for example, the flight path of the drone is: the first network layer X corresponding to network device a proceeds to the second network layer Y corresponding to network device B. When the unmanned aerial vehicle travels to the position 1, that is, the unmanned aerial vehicle is located at different network layers at the same height, for example, in an overlapping area of a first network layer X corresponding to the network device a and a first network layer X corresponding to the network device B, the unmanned aerial vehicle needs to perform the same-layer switching at this time, and the first network layer X corresponding to the network device a is switched to the first network layer X corresponding to the network device B. When the unmanned aerial vehicle travels to the position 2, that is, the unmanned aerial vehicle is located at a network layer with different heights, for example, a first network layer X corresponding to the network device B and a second network layer Y corresponding to the network device B are connected, at this time, the unmanned aerial vehicle needs to perform cross-layer switching, and the first network layer X corresponding to the network device B is switched to the second network layer Y corresponding to the network device B.
The switching method provided in the embodiment of the present application is described below with reference to the communication system shown in fig. 1 and services that require cross-layer switching and peer-to-peer switching when terminal devices such as an unmanned aerial vehicle are in a high-altitude hierarchical scene.
As shown in fig. 2, first, a network device configures a first threshold parameter to a terminal, where the first threshold parameter includes an altitude interval, a first duration threshold, and a target signal strength. The terminal is influenced by a first threshold parameter and a service switching instruction, and if the first threshold parameter comprises a height interval and a first time length threshold, a switch for switching between network layers with different heights is turned on; if the first threshold parameter includes the target signal strength, a switch for switching between network layers at the same height is turned on. Wherein, two switches work independently, do not influence each other.
It should be noted that, while the switch for switching between network layers of different heights is turned on, the switch for switching between network layers of the same height is turned off. Accordingly, the switch for switching between network layers of different heights is turned off while the switch for switching between network layers of the same height is turned on.
Based on the above, in the case that the switch for switching between the network layers of different heights is turned on, as shown in fig. 3, the switching method includes:
s101, the terminal determines the height of the terminal under the condition that the first threshold parameter acquired in advance comprises a height interval.
Specifically, the height interval is a stable network height interval of a network layer where the terminal is currently located, and the stable network height interval is determined by network planning and deployment.
For example, as shown in fig. 4, assuming that the network layer where the terminal is currently located is the first network layer X, the altitude interval is a stable network altitude interval of the first network layer X, and is marked as (H)L，n0，HU，n0). Correspondingly, if the network layer where the terminal is currently located is the second network layer Y, the height interval is a stable network height interval of the second network layer Y.
In one example, the terminal's altitude (labeled H) may be determined by the terminal and transmitted to the network device. For example, the terminal may measure the height of the terminal in real time or periodically by using a positioning method such as Beidou positioning and GPS (global positioning system). In another example, the network device determines the altitude of the terminal by way of a relative positioning.
And S102, the terminal executes switching among network layers with different heights according to the height and the height interval of the terminal.
Specifically, as shown in fig. 5, step S102 includes:
and S1021, the terminal determines to execute switching between network layers with different heights according to the height and the height interval of the terminal.
And S1022, the network equipment determines that the height of the terminal is not located in the height interval.
It should be noted that, there are boundary regions on both the upper and lower sides of the height interval, and the switching between the network layers with different heights only occurs in the boundary regions, so when it is determined that the height of the terminal is not located in the height interval, the terminal performs the switching between the network layers with different heights.
It should be noted that, if it is determined that the height of the terminal is within the height interval, the height of the terminal is determined again, that is, step S102 is executed again until it is determined that the height of the terminal is not within the height interval.
S1023, the terminal receives the switching threshold configuration parameter from the network equipment.
It should be noted that, when the terminal determines the height of the terminal, the terminal sends the height of the terminal to the network device, and the network device determines, according to the height of the terminal, that the height of the terminal is not located in the height interval, and then the network device sends the switching threshold configuration parameter to the terminal. And under the condition that the network equipment determines the height of the terminal, the network equipment determines that the height of the terminal is not positioned in the height interval according to the height of the terminal, and sends a switching threshold configuration parameter to the terminal.
As shown in fig. 6, fig. 6 illustrates that the terminal is currently located in the first network layer X. Specifically, the handover threshold configuration parameters include: a first height threshold, labeled H'U，n1(ii) a A second altitude threshold, labeled H'L，n1(ii) a A third height threshold, labeled H'U，n0(ii) a Fourth height threshold, labeled H'L，n0(ii) a A first signal strength threshold, denoted ST(ii) a A second signal strength threshold, denoted SS(ii) a A second duration threshold marked T2(ii) a A third duration threshold, labeled T3。
In one example, the interval between the third and fourth altitude thresholds is equal to the altitude interval in the above embodiment, i.e. H'U，n0＝HU，n0，H'L，n0＝HL，n0。
In the embodiment of the present application, a network layer in which the terminal is currently located may be referred to as a local network layer, and a network layer to which the terminal is to be switched with the current network layer may be referred to as an adjacent network layer. Referring to fig. 6, for example, in the case where the terminal is currently located at the first network layer X, the first network layer X may be referred to as a local network layer, and the second network layer Y may be referred to as an adjacent network layer.
Based on this, the first altitude threshold may be referred to as an adjacent network layer switching altitude threshold upper limit (H'U，n1) The second altitude threshold may be referred to as a neighbor network layer handover altitude threshold lower bound (H'L，n1) (ii) a The third altitude threshold may be referred to as the upper threshold (H ') of the switching altitude threshold of the network layer'U，n0) The fourth altitude threshold may be referred to as the present network layer handover altitude threshold lower bound (H'L，n0) (ii) a The first signal strength threshold may be referred to as a neighbor network layer signal strength cross-layer handover threshold (S)T) (ii) a The second signal strength threshold may be referred to as a local network layer signal strength cross-layer handover threshold (S)S) (ii) a The second duration threshold may be referred to as a cross-layer handover signal strength validity duration threshold (T)2) (ii) a The third duration threshold may be referred to as a cross-layer handover height effective duration threshold (T)3)。
And S1024, the terminal executes switching among network layers with different heights according to the switching threshold configuration parameters.
In one possible design, in the case where the height of the terminal is greater than the first height threshold and less than the fourth height threshold; or H 'in the case that the height of the terminal is greater than the third height threshold and less than the second height threshold'U，n1＜H＜H'L，n0(ii) a Or H'U，n0＜H＜H'L，n1In the case of (3), as shown in fig. 7, step S1024 includes:
s10241, the terminal acquires the signal intensity of the network layers with different heights.
S10242, the terminal performs switching between the network layers with different heights according to the signal strength of the network layers with different heights and the switching threshold configuration parameter.
It should be noted that, in the case of performing step 1024 for the first time, the current height of the terminal may adopt the information value of the height of the terminal in the above embodiment, or the height of the terminal may be determined again. In the case of performing step 1024 for the second time or more, the height of the terminal may be re-determined, that is, the information value of the height of the terminal may be measured in real time or periodically.
Specifically, the network layers with different heights include a first network layer X and a second network layer Y. In the embodiment of the present application, a network layer where the terminal is currently located is referred to as a first network layer X, and a network layer to be switched with the current network layer is referred to as a second network layer Y. It should be understood that the network layers with different heights may further include a third network layer, a fourth network layer, and the like, which are not described in detail herein.
Signal strength at first network layer X (labeled S)1) Less than a second signal strength threshold within a second duration threshold, and a signal strength of a second network layer Y (labeled S)2) In the case of being greater than the first signal strength threshold within the second duration threshold, i.e. at T2Always satisfies S within the time1＜SSAnd S is2＞STThe terminal performs handover between network layers of different heights. Illustratively, a handover is made from a first network layer X to a second network layer Y.
In the case that the signal strength of the first network layer X is greater than or equal to the second signal strength threshold within the second duration threshold; alternatively, the signal strength of the second network layer Y is less than or equal to the first signal strength threshold within the second duration threshold, i.e. at T2Within time, S1≥SS(ii) a Or, S2≤STIn the case of (3), step S1024 includes: s10243, according to the duration of the first timer, switching between the network layers with different heights is executed.
Wherein the duration of the first timer (labeled as T)S1) The time length used for switching between the network layers with different heights is executed according to the signal intensity of the network layers with different heights and the configuration parameter of the switching threshold at the last time, namely the time of the first timerThe length of time from the last execution of step S10242 to the execution of the current step S10243.
Specifically, step S10243 includes: under the condition that the duration of the first timer is less than the third duration threshold, the signal strength of the network layers with different heights is obtained again, namely at TS1＜T3In the case of (1), step S10241 is re-executed; when the duration of the first timer is greater than or equal to the third duration threshold, executing the switching between the network layers with different heights according to the switching threshold configuration parameter again, namely at TS1≥T3In the case of (3), step S1024 is executed again.
In another possible design, where the height of the terminal is less than the first height threshold; or in the case that the height of the terminal is greater than the second height threshold, i.e. in H < H'U，n1In the case of (1); or in H > H'L，n1In case of (2), the terminal performs handover between network layers of different heights.
In yet another possible design, in the case that the height of the terminal is in the interval of the fourth height threshold and the third height threshold, i.e. in H ∈ (H'L，n0,H'U，n0) Under the condition of (3), the terminal executes the switching between the network layers with different heights according to the first time length threshold.
In particular, the duration of the second timer (denoted T)S2) Under the condition that the signal intensity is smaller than the first time length threshold, the terminal acquires the signal intensity of the network layers with different heights again; and the terminal executes the switching between the network layers with different heights according to the signal intensity of the network layers with different heights and the switching threshold configuration parameter. I.e. at TS2＜T1In the case of (1), steps S10241 to S10242 are re-executed.
And under the condition that the duration of the second timer is greater than or equal to the first duration threshold, the terminal executes switching between the network layers with different heights again according to the height and the height interval of the terminal. I.e. at TS2≥T1Step S102 is executed again.
It should be noted that the duration of the second timer is a duration used by the terminal to perform the handover between the network layers with different heights according to the height and the height interval of the terminal at the last time. I.e., the length of time from the last execution of step S102 to the current execution of step S1024.
In the case where a switch for switching between network layers of the same height is turned on, as shown in fig. 8, the method includes:
s201, the terminal determines the signal intensity of the current access network layer of the terminal under the condition that the first threshold parameter comprises the target signal intensity.
S202, the terminal executes switching between network layers with the same height according to the signal strength of the current access network layer of the terminal and the target signal strength.
Specifically, as shown in fig. 9, step S202 includes:
s2021, the terminal obtains the signal intensity of the current access network layer of the terminal.
S2022, the terminal determines the signal intensity of the terminal switching network layer under the condition that the signal intensity of the terminal currently accessing the network layer is smaller than the target signal intensity; and the terminal executes the switching between the network layers with the same height according to the signal intensity of the current access network layer of the terminal and the signal intensity of the switching network layer of the terminal.
Specifically, step S2022 includes:
s20221, the terminal obtains the signal intensity of the terminal switching network layer.
S20222, the terminal executes the switching between the network layers with the same height under the condition that the signal intensity of the current access network layer of the terminal and the signal intensity of the terminal switching network layer meet the preset conditions; and under the condition that the signal intensity of the current access network layer of the terminal and the signal intensity of the terminal switching network layer do not meet the preset condition, re-acquiring the signal intensity of the current access network layer of the terminal, namely re-executing the step S2021 until the terminal executes the switching between the network layers at the same height.
Illustratively, the preset condition is that the signal intensity of a terminal switching network layer is greater than the signal intensity of a terminal currently accessing the network layer; or the difference between the signal intensity of the terminal switching network layer and the signal intensity of the terminal currently accessing the network layer is greater than the threshold. The threshold may be specifically set by network planning and deployment according to needs, and the embodiment of the present application is not specifically limited.
For example, referring to fig. 1, it is assumed that a network layer currently accessed by a terminal is a first network layer X corresponding to a network device a, and a network layer to which the terminal switches is the first network layer X corresponding to a network device B, and if the signal intensity of the first network layer X corresponding to the network device B is greater than that of the first network layer X corresponding to the network device a, the terminal is switched from the first network layer X corresponding to the network device a to the first network layer X corresponding to the network device B.
It should be noted that, in the foregoing embodiment, reference may be made to the prior art for a method for obtaining the signal strength of the current access network layer of the terminal and obtaining the signal strength of the terminal switching network layer, which is not described in detail in this embodiment.
The scheme provided by the embodiment of the application is introduced mainly from the point of interaction between devices. It will be appreciated that each device, in order to carry out the above-described functions, comprises corresponding hardware structures and/or software modules for performing each function. Those of skill in the art will readily appreciate that the present application is capable of hardware or a combination of hardware and computer software implementing the various illustrative algorithm steps described in connection with the embodiments disclosed herein. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
In the embodiment of the present application, functional modules may be divided according to the above method examples, for example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. It should be noted that, in the embodiment of the present application, the division of the module is schematic, and is only one logic function division, and there may be another division manner in actual implementation.
In the case of dividing each functional module with corresponding functions, fig. 10 shows a terminal device 300, and the terminal device 300 may include a transceiver module 301 and a processing module 302. The terminal device 300 may be a terminal device, or may be a chip applied in the terminal device or other combined devices, components, and the like having the functions of the terminal device.
For example, transceiver module 301 may be used to perform all transceiving operations performed by a terminal device in the embodiments illustrated in fig. 2-3, 5, and 7-9, and/or other processes to support the techniques described herein. Processing module 302 may perform all operations performed by the terminal device in the embodiments shown in fig. 2-3, 5, and 7-9, except for transceiving operations, and/or other processes to support the techniques described herein.
Specifically, the transceiver module 401 is configured to obtain a first threshold parameter sent by a network device.
A processing module 302, configured to determine a height of the terminal when the pre-obtained first threshold parameter includes a height interval; and executing switching between network layers with different heights according to the height and the height interval of the terminal. For example, as shown in connection with fig. 3, the processing module 302 may be configured to perform step S101.
The processing module 302 is configured to determine the signal strength of the current access network layer of the terminal when the first threshold parameter includes the target signal strength; and executing the switching between the network layers with the same height according to the signal intensity of the current access network layer of the terminal and the target signal intensity. For example, as shown in connection with fig. 8, the processing module 302 may be configured to execute step S201.
In one possible design, the transceiver module 301 is configured to obtain the height of the terminal, and send the height of the terminal to the network device; the processing module 302 is specifically configured to determine, according to the height and the height interval of the terminal, switching between network layers to be executed at different heights; receiving a switching threshold configuration parameter from network equipment, wherein the switching threshold configuration parameter is used for determining switching between network layers with different heights to be executed; and executing the switching between the network layers with different heights according to the switching threshold configuration parameters. For example, as shown in conjunction with fig. 5, the processing module 302 may be configured to perform steps S1021, S1023, S1024.
In one possible design, the processing module 302 is further configured to determine that the height of the terminal is not located in the height interval. For example, the processing module 302 may be used to execute step S1022.
In one possible design, the first threshold parameter further includes a first time length threshold; the handover threshold configuration parameters include: a first altitude threshold, a second altitude threshold, a third altitude threshold, and a fourth altitude threshold; the processing module 302 is further configured to, if the height of the terminal is greater than the first height threshold and less than the fourth height threshold; or acquiring the signal intensity of the network layers with different heights under the condition that the height of the terminal is greater than the third height threshold and less than the second height threshold; and executing the switching between the network layers with different heights according to the signal intensity of the network layers with different heights and the switching threshold configuration parameter. For example, as shown in conjunction with fig. 7, the processing module 302 may be configured to perform steps S10241 and S10242.
The processing module 302 is further configured to, in case the height of the terminal is less than the first height threshold; or in the case that the height of the terminal is greater than the second height threshold, performing handover between network layers of different heights.
The processing module 302 is further configured to perform a handover between network layers with different heights according to the first time length threshold when the height of the terminal is in an interval between the fourth height threshold and the third height threshold.
In one possible design, the processing module 302 is further configured to perform a handover between network layers of different heights if the signal strength of the first network layer is less than the second signal strength threshold within the second duration threshold and the signal strength of the second network layer is greater than the first signal strength threshold within the second duration threshold; otherwise, under the condition that the duration of the first timer is less than the third duration threshold, the signal intensity of the network layers with different heights is obtained again; when the duration of the first timer is greater than or equal to the third duration threshold, switching between network layers with different heights is executed according to the switching threshold configuration parameters again; the time length of the first timer is the time length used for switching between the network layers with different heights to the current time according to the signal strength of the network layers with different heights and the switching threshold configuration parameter at the last time. For example, as shown in connection with fig. 7, the processing module 302 may be configured to perform step S10243.
In a possible design, the processing module 302 is further configured to, in a case that the duration of the second timer is less than the first duration threshold, reacquire signal strengths of network layers of different heights; executing switching between the network layers with different heights according to the signal intensity of the network layers with different heights and the configuration parameters of the switching threshold; when the duration of the second timer is greater than or equal to the first duration threshold, switching between network layers with different heights is executed again according to the height of the terminal and the height interval; the duration of the second timer is the duration used for switching between network layers with different heights to the current time according to the height of the terminal and the height interval at the last time.
In a possible design, the transceiver module 301 is further configured to obtain the signal strength of the current access network layer of the terminal; the processing module 302 is specifically configured to determine the signal strength of the terminal switching network layer when the signal strength of the terminal currently accessing the network layer is smaller than the target signal strength; and executing the switching between the network layers with the same height according to the signal intensity of the current access network layer of the terminal and the signal intensity of the switching network layer of the terminal. For example, as shown in fig. 9, the transceiver module may be configured to perform step S2021; as shown in connection with fig. 8, the processing module 302 may be configured to perform steps S201 and S202.
In a possible design, the transceiver module 301 is further configured to obtain a signal strength of a terminal switching network layer; the processing module 302 is further configured to execute a handover between network layers of the same height when the signal strength of the terminal currently accessing the network layer and the signal strength of the terminal switching network layer satisfy a preset condition; otherwise, the transceiver module 301 re-acquires the signal strength of the current access network layer of the terminal until the terminal performs handover between network layers of the same height. For example, as shown in fig. 9, the transceiver module 301 may be configured to perform step S20221; the processing module 302 may be configured to perform step S20222.
As another implementation manner, the embodiment of the present application further provides a terminal device. As shown in fig. 11, the terminal device 400 may include at least one processor 401, a transceiver 402, a communication line 403, and a memory 404.
The processor 401, the memory 404 and the transceiver 402 may be connected by a communication line 403.
Processor 401 is a Central Processing Unit (CPU), a general purpose processor Network Processor (NP), a Digital Signal Processor (DSP), a microprocessor, a microcontroller, a Programmable Logic Device (PLD), or any combination thereof. The processor 201 may also be other devices with processing functions, such as, without limitation, a circuit, a device, or a software module.
A transceiver 402 for communicating with other devices or other communication networks. The other communication network may be an ethernet, a Radio Access Network (RAN), a Wireless Local Area Network (WLAN), or the like. The transceiver 402 may be a module, a circuit, a transceiver, or any device capable of enabling communication.
A communication line 403 for transmitting information between the respective components included in the terminal apparatus 400.
A memory 404 for storing instructions. Wherein the instructions may be a computer program.
The memory 404 may be a read-only memory (ROM) or other types of static storage devices that can store static information and/or instructions, a Random Access Memory (RAM) or other types of dynamic storage devices that can store information and/or instructions, an electrically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, optical disc storage (including compact disc, laser disc, optical disc, digital versatile disc, blu-ray disc, etc.), a magnetic disc storage medium or other magnetic storage devices, and the like, without limitation.
It is noted that the memory 404 may exist separately from the processor 401 or may be integrated with the processor 401. The memory 404 may be used for storing instructions or program code or some data or the like. The memory 404 may be located inside the communication device or outside the terminal device 400, and the embodiment of the present application is not limited thereto. The processor 401 is configured to execute the instructions stored in the memory 404 to implement the switching method provided in the following embodiments of the present application.
In one example, the processor 401 may include one or more CPUs, such as CPU0 and CPU1 in FIG. 11.
As an alternative implementation, the terminal device 400 includes multiple processors, for example, the processor 407 may be included in addition to the processor 401 in fig. 11.
As an alternative implementation, the transceiver 402 may include a receiving unit to implement the receiving function, and a transmitting unit to implement the transmitting function.
In actual implementation, the transceiver module 301 and the processing module 302 may be implemented by the processor 401 shown in fig. 11 calling the program code in the memory 404. For the specific implementation process, reference may be made to the descriptions of the handover method portions shown in fig. 2-3, fig. 5, and fig. 7-9, which are not described herein again.
It should be noted that the terminal device 400 may be a desktop computer, a portable computer, a network server, a mobile phone, a tablet computer, a wireless terminal, an embedded device, a chip system or a device with a similar structure as in fig. 11. Further, the constituent structure shown in fig. 11 does not constitute a limitation of the terminal device 400, and the terminal device 400 may include more or less components than those shown in fig. 11, or combine some components, or a different arrangement of components, in addition to the components shown in fig. 11.
In the embodiment of the present application, the chip system may be composed of a chip, and may also include a chip and other discrete devices.
In addition, acts, terms, and the like referred to between the embodiments of the present application may be mutually referenced and are not limited. In the embodiment of the present application, the name of the message exchanged between the devices or the name of the parameter in the message, etc. are only an example, and other names may also be used in the specific implementation, which is not limited.
The embodiment of the application also provides a computer readable storage medium. All or part of the processes in the above method embodiments may be performed by relevant hardware instructed by a computer program, which may be stored in the above computer-readable storage medium, and when executed, may include the processes in the above method embodiments. The computer-readable storage medium may be an internal storage unit of the terminal (including the data sending end and/or the data receiving end) of any previous embodiment, for example, a hard disk or a memory of the terminal. The computer readable storage medium may also be an external storage device of the terminal, such as a plug-in hard disk, a Smart Memory Card (SMC), a Secure Digital (SD) card, a flash memory card (flash card), and the like, which are provided on the terminal. Further, the computer-readable storage medium may include both an internal storage unit and an external storage device of the terminal. The computer-readable storage medium stores the computer program and other programs and data required by the terminal. The above-described computer-readable storage medium may also be used to temporarily store data that has been output or is to be output.
Through the above description of the embodiments, it is clear to those skilled in the art that, for convenience and simplicity of description, the foregoing division of the functional modules is merely used as an example, and in practical applications, the above function distribution may be completed by different functional modules according to needs, that is, the internal structure of the device may be divided into different functional modules to complete all or part of the above described functions.
In the several embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described device embodiments are merely illustrative, and for example, the division of the modules or units is only one logical functional division, and there may be other divisions when actually implemented, for example, a plurality of units or components may be combined or may be integrated into another device, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may be one physical unit or a plurality of physical units, that is, may be located in one place, or may be distributed in a plurality of different places. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a readable storage medium. Based on such understanding, the technical solutions of the embodiments of the present application may be essentially or partially contributed to by the prior art, or all or part of the technical solutions may be embodied in the form of a software product, where the software product is stored in a storage medium and includes several instructions to enable a device (which may be a single chip, a chip, or the like) or a processor (processor) to execute all or part of the steps of the methods described in the embodiments of the present application. And the aforementioned storage medium includes: a U disk, a removable hard disk, a ROM, a RAM, a magnetic disk or an optical disk, and various media capable of storing program codes.
The above description is only an embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions within the technical scope of the present disclosure should be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims (11)

1. A method of handover, comprising:
determining the height of the terminal under the condition that the pre-acquired first threshold parameter comprises a height interval; according to the height of the terminal and the height interval, switching between network layers with different heights is executed;
determining the signal strength of the current access network layer of the terminal under the condition that the first threshold parameter comprises the target signal strength; and executing the switching between the network layers with the same height according to the signal intensity of the current access network layer of the terminal and the target signal intensity.
2. The handover method according to claim 1, wherein the performing handover between network layers of different heights according to the height of the terminal and the height interval comprises:
determining switching between network layers with different heights to be executed according to the height of the terminal and the height interval;
receiving a switching threshold configuration parameter from network equipment; the switching threshold configuration parameter is used for determining switching between network layers with different heights to be executed;
and executing the switching between the network layers with different heights according to the switching threshold configuration parameters.
3. The handover method according to claim 2, wherein before the receiving the handover threshold configuration parameter from the network device, the handover method further comprises:
and determining that the height of the terminal is not located in the height interval.
4. The handover method of claim 2, wherein the first threshold parameter further comprises a first time duration threshold; the switching threshold configuration parameters include: a first altitude threshold, a second altitude threshold, a third altitude threshold, and a fourth altitude threshold; the performing the switching between the network layers with different heights according to the switching threshold configuration parameter comprises:
under the condition that the height of the terminal is greater than the first height threshold and less than the fourth height threshold; or acquiring the signal intensity of the network layers with different heights under the condition that the height of the terminal is greater than the third height threshold and less than the second height threshold; executing switching between the network layers with different heights according to the signal intensity of the network layers with different heights and the switching threshold configuration parameter; or
In the case that the height of the terminal is less than the first height threshold; or under the condition that the height of the terminal is greater than the second height threshold, switching between network layers with different heights is executed; or alternatively
And under the condition that the height of the terminal is in the interval of the fourth height threshold and the third height threshold, executing switching between network layers with different heights according to the first time length threshold.
5. The handover method according to claim 4, wherein the handover configuration threshold parameter further comprises: a first signal strength threshold, a second duration threshold and a third duration threshold; the network layers with different heights comprise a first network layer and a second network layer; the performing the handover between the network layers with different heights according to the signal strengths of the network layers with different heights and the handover threshold configuration parameter includes:
performing handover between network layers of different heights if the signal strength of the first network layer is less than the second signal strength threshold within the second duration threshold and the signal strength of the second network layer is greater than the first signal strength threshold within the second duration threshold;
otherwise, under the condition that the duration of the first timer is less than the third duration threshold, the signal intensity of the network layers with different heights is obtained again; when the duration of the first timer is greater than or equal to the third duration threshold, executing switching between network layers with different heights according to the switching threshold configuration parameter again;
and the duration of the first timer is the duration used for switching between the network layers with different heights to the current time according to the signal strength of the network layers with different heights and the switching threshold configuration parameter at the last time.
6. The handover method according to claim 4, wherein the performing handover between network layers of different heights according to the first time duration threshold comprises:
under the condition that the duration of a second timer is less than the first duration threshold, the signal intensity of the network layers with different heights is obtained again; executing switching between the network layers with different heights according to the signal intensity of the network layers with different heights and the switching threshold configuration parameter;
when the duration of the second timer is greater than or equal to the first duration threshold, switching between network layers with different heights is executed again according to the height of the terminal and the height interval;
and the duration of the second timer is the duration used for switching between network layers with different heights to the current time according to the height of the terminal and the height interval at the last time.
7. The handover method according to claim 1, wherein the performing handover between network layers of the same altitude according to the signal strength of the terminal currently accessing the network layer and the target signal strength comprises:
acquiring the signal intensity of a current access network layer of the terminal;
determining the signal intensity of the terminal switching network layer under the condition that the signal intensity of the terminal currently accessing the network layer is smaller than the target signal intensity; and executing switching between network layers of the same height according to the signal intensity of the current access network layer of the terminal and the signal intensity of the switching network layer of the terminal.
8. The handover method according to claim 7, wherein the performing handover between network layers of the same height according to the signal strength of the terminal currently accessing the network layer and the signal strength of the terminal switching the network layer comprises:
acquiring the signal intensity of the terminal switching network layer;
under the condition that the signal intensity of the current access network layer of the terminal and the signal intensity of the switching network layer of the terminal meet preset conditions, switching between network layers at the same height is executed;
otherwise, the signal intensity of the current access network layer of the terminal is obtained again until the terminal executes the switching between the network layers with the same height.
9. A switching apparatus, wherein the switching apparatus is applied to a terminal, the switching apparatus comprising:
the processing module is used for determining the height of the terminal under the condition that the pre-acquired first threshold parameter comprises a height interval; according to the height of the terminal and the height interval, switching between network layers with different heights is executed;
the processing module is used for determining the signal strength of the current access network layer of the terminal under the condition that the first threshold parameter comprises the target signal strength; and executing the switching between the network layers with the same height according to the signal intensity of the current access network layer of the terminal and the target signal intensity.
10. A terminal device, comprising: a processor, a transceiver, a communication line, and a memory; the memory is used for storing computer execution instructions, and the processor is connected with the memory through the communication line;
when the terminal device is running, the processor executes the computer-executable instructions stored by the memory to cause the terminal device to perform the handover method of any one of claims 1-8.
11. A computer-readable storage medium, characterized in that it stores computer instructions or a program which, when run on a computer, causes the computer to perform the handover method according to any one of claims 1 to 8.
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